Discovering Systems Running the Logical Domains Manager

Multicast Communication

This discovery mechanism uses the same multicast network that is used by
the ldmd daemon to detect collisions when automatically assigning MAC addresses. To
configure the multicast socket, you must supply the following information:

#define MAC_MULTI_PORT 64535
#define MAC_MULTI_GROUP "239.129.9.27"

By default, only multicast packets can be sent on the subnet to
which the machine is attached. You can change the behavior by setting
the ldmd/hops SMF property for the ldmd daemon.

Message Format

The discovery messages must be clearly marked so as not to be
confused with other messages. The following multicast message format ensures that discovery
messages can be distinguished by the discovery listening process: